Released August 2019. *Micro Four Thirds lens. This large-aperture standard zoom lens covers the focal lengths of five prime lenses, from ultra-wide 20mm to standard 50mm. Mount: Micro Four Thirds mount. Focal length: 10-25mm (35mm equivalent: 20-50mm). Maximum aperture: f/1.7, f/16. Filter diameter: 77mm. [HX1025] HX1025 Released August 2019. Achieves an f/1.7 maximum aperture throughout the zoom range. Meeting Leica's strict optical standards, this SUMMILUX large-aperture standard zoom lens features a 17-element design in 12 groups, including three aspherical and four ED lenses, for superior imaging performance throughout the entire zoom range. With an F1.7 maximum aperture, this lens can handle low-light situations without the need for large-aperture prime lenses. It enables impressive background capture in both still images and video, broadening the scope of your photography. Covering the focal lengths of five prime lenses, from ultra-wide-angle 20mm to standard 50mm, this single lens covers the focal lengths of five prime lenses*. From ultra-wide-angle shots of expansive celestial bodies and landscapes, to wide-angle and semi-standard snapshots, and standard portraits, you can capture a variety of scenes without changing lenses. The large F1.7 aperture also enables video capture in low-light situations and beautiful bokeh effects. *Five typical focal lengths: ultra-wide-angle 20mm, wide-angle 24mm, wide-angle 28mm, semi-standard 35mm, and standard 50mm. Achieve superior mobility despite being a large-aperture zoom lens. Despite its lightweight design, this large-aperture zoom lens weighs just 690g and boasts a compact size with a total length of approximately 128mm (maximum diameter of 87.6mm). Its portability makes it ideal for a variety of shooting situations, enabling stable, handheld shooting. High-speed, high-precision AF for high-quality video recording. The latest optical design thoroughly suppresses focusing breathing, a phenomenon known as "focus breathing." Furthermore, it supports high-speed, high-precision contrast AF at 240fps, and its improved AF tracking performance ensures precise focus tracking even on fast-moving subjects. Smooth control of f-stop changes, even in scenes with large changes in brightness, ensures stable exposure control even when zooming, and supports comfortable video shooting. The inner focus system ensures quiet operation while achieving high-speed, high-precision AF. An aperture ring is built into the lens barrel. You can intuitively change the aperture value by operating the ring, even while looking through the viewfinder. In addition to micro-step aperture control, the clickless aperture ring itself enables stable exposure control even when zooming and panning during video recording, enabling impressive video production. Focus Clutch for Quick AF/MF Switching: The focus clutch mechanism allows for quick AF/MF switching by simply sliding the focus ring. Furthermore, manual focus operation can be switched between relying on the speed of the ring's rotation (infinite rotation) for still photography and relying on the absolute position of the ring's rotation angle for video, providing superior manual focus control. The dust- and weather-resistant design protects the lens from harsh environments, allowing you to take it on professional photography in a wide range of fields. Capture those rare, unexpected shutter opportunities regardless of the weather, protecting your precious lens from water droplets and dust. (When mounted on a Panasonic dust- and weather-resistant camera body.) Low-temperature resistance down to -10°C: The lens is designed to withstand temperatures as low as -10°C, allowing you to capture images in cold climates such as snowy mountains and ski slopes. Capture the beautiful, fantastical world of snow and ice in your next photograph. Accessories: Lens hood, lens cap, lens rear cap, lens pouch ■ Specifications ■ Lens construction: 17 elements in 12 groups (3 aspherical lenses, 4 ED lenses, 1 UHR lens) Mount: Micro Four Thirds mount/metal mount Angle of view: W (f=10mm): 94° - T (f=25mm): 47° Focal length: 10-25mm (35mm equivalent: 20-50mm) Maximum aperture: F1.7, F16 Aperture type: 9-blade circular iris diaphragm Shooting range: 0.28m - ∞ (from the image plane) Maximum magnification: 0.14x (35mm equivalent) 0.28x) Filter diameter: φ77mm Dustproof and splashproof: Yes (when attached to a Panasonic dustproof and splashproof camera body.) Maximum diameter x length: φ87.6mm x approx. 128mm (from the tip of the lens to the lens mount reference plane) Weight: approx. 690g (excluding lens hood, lens cap, and lens rear cap) Operating environment (usable temperature/humidity): -10 to 40°C/10 to 80% *Micro Four Thirds lens manufacturer's warranty period: 1 year